typescript-assistant/src/dependency-injector.ts

Combines and integrates professional Typescript tools into your project

import { sep } from "path";

import { createBus } from "./bus";
import { createFormatter } from "./code-style/formatter";
import { createLinter } from "./code-style/linter";
import { createCompiler } from "./compiler";
import { Dependencies } from "./dependencies";
import { createGit } from "./git";
import { createInjector } from "./injector";
import { createConsoleLogger } from "./logger";
import { Server } from "./server";
import { createDefaultTaskRunner, createWindowsTaskRunner } from "./taskrunner";
import { createNyc } from "./testing/nyc";
import { createWatcher } from "./watcher";

export let createDependencyInjector = (): (<T>(
  createFunction: (dependencies: Partial<Dependencies>) => T
) => T) => {
  let logger = createConsoleLogger();
  let taskRunner =
    sep === "\\" ? createWindowsTaskRunner() : createDefaultTaskRunner();
  let bus = createBus();

  let dependencies: Partial<Dependencies> = {
    bus,
    logger,
    taskRunner,
  };

  let { inject } = createInjector(dependencies);

  dependencies.inject = inject;
  dependencies.compiler = inject(createCompiler);
  dependencies.git = inject(createGit);
  dependencies.formatter = inject(createFormatter);
  dependencies.linter = inject(createLinter);
  dependencies.nyc = inject(createNyc);
  dependencies.watcher = inject(createWatcher);

  // Server is created lazily, because not all of its dependencies may be present
  let server: Server | undefined;
  Object.defineProperty(dependencies, "server", {
    get: () => {
      if (!server) {
        // eslint-disable-next-line @typescript-eslint/no-var-requires
        server = inject(require("./server").createServer);
      }
      return server;
    },
  });

  return dependencies.inject;
};